Are hyperon resonances required in the elementary $K^{+}\Lambda$ photoproduction?

Abstract

We have investigated the role of hyperon resonances in the kaon photoproduction process, $\gamma p\to K^{+}\Lambda$, by using a covariant isobar model. To this end, new experimental data are used in the fitting process, whereas the old SAPHIR 1998 data are also used for comparison. The result indicates that the $\Lambda (1600)P_{01}$ and $\Lambda (1810)P_{01}$ hyperon resonances can significantly reduce the ${\chi }^2$ and, simultaneously, can increase the hadronic form factor cut-off in the background terms. This finding is different from the result of the previous studies, which showed that the $\Lambda (1800)S_{01}$ was important for this purpose, instead of the $\Lambda (1600)P_{01}$.

11 pages, 11 figures, dedicated to Professor Henryk Witala at the occasion of his 60th birthday

References in corpus (15)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Quasi-Two-Body Decays of Nonstrange Baryons
• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• Evidence for a missing nucleon resonance in kaon photoproduction
• The gamma + p to K+ + Lambda and gamma + p to K+ + Sigma0 reactions at forward angles with photon energies from 1.5 to 2.4 GeV
• Differential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab
• First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction
• Gauge-invariant tree-level photoproduction amplitudes with form factors
• Photo- and Electroproduction of Eta Mesons
• Decays of Baryon Resonances into K Lambda, K^+ Sigma^0 and K^0 Sigma^+
• Contribution of higher nucleon resonances to K*Λ photoproduction
• The role of hyperon resonances in p(gamma,K+)Lambda processes
• Origin of the second peak in the cross section of the $K^{+}\Lambda$ photoproduction
• Analysis of the consistency of kaon photoproduction data with Lambda in the final state
• Photo- and Electroproduction of the Hypertriton on 3He

Cited by in corpus (6)

• Photoproduction of $K\Lambda$ on the proton
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Coupling strength of the $N^{\ast }(1535)S_{11}$ to the $K^{+}\Lambda$ channel
• Effect of the transfer reactions for 16O+10B elastic scattering
• Ridge regression for minimizing the couplings of hyperon resonances in the $K^{+}\Lambda$ photoproduction
• Some Phenomenological Aspects of Kaon Photoproduction in the Extreme Kinematics